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path: root/drivers/net/wireless/p54/txrx.c
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Diffstat (limited to 'drivers/net/wireless/p54/txrx.c')
-rw-r--r--drivers/net/wireless/p54/txrx.c869
1 files changed, 869 insertions, 0 deletions
diff --git a/drivers/net/wireless/p54/txrx.c b/drivers/net/wireless/p54/txrx.c
new file mode 100644
index 000000000000..b6dda2b27fb5
--- /dev/null
+++ b/drivers/net/wireless/p54/txrx.c
@@ -0,0 +1,869 @@
+/*
+ * Common code for mac80211 Prism54 drivers
+ *
+ * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
+ * Copyright (c) 2007-2009, Christian Lamparter <chunkeey@web.de>
+ * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
+ *
+ * Based on:
+ * - the islsm (softmac prism54) driver, which is:
+ * Copyright 2004-2006 Jean-Baptiste Note <jbnote@gmail.com>, et al.
+ * - stlc45xx driver
+ * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/init.h>
+#include <linux/firmware.h>
+#include <linux/etherdevice.h>
+
+#include <net/mac80211.h>
+
+#include "p54.h"
+#include "lmac.h"
+
+#ifdef P54_MM_DEBUG
+static void p54_dump_tx_queue(struct p54_common *priv)
+{
+ unsigned long flags;
+ struct ieee80211_tx_info *info;
+ struct p54_tx_info *range;
+ struct sk_buff *skb;
+ struct p54_hdr *hdr;
+ unsigned int i = 0;
+ u32 prev_addr;
+ u32 largest_hole = 0, free;
+
+ spin_lock_irqsave(&priv->tx_queue.lock, flags);
+ printk(KERN_DEBUG "%s: / --- tx queue dump (%d entries) --- \n",
+ wiphy_name(priv->hw->wiphy), skb_queue_len(&priv->tx_queue));
+
+ prev_addr = priv->rx_start;
+ skb_queue_walk(&priv->tx_queue, skb) {
+ info = IEEE80211_SKB_CB(skb);
+ range = (void *) info->rate_driver_data;
+ hdr = (void *) skb->data;
+
+ free = range->start_addr - prev_addr;
+ printk(KERN_DEBUG "%s: | [%02d] => [skb:%p skb_len:0x%04x "
+ "hdr:{flags:%02x len:%04x req_id:%04x type:%02x} "
+ "mem:{start:%04x end:%04x, free:%d}]\n",
+ wiphy_name(priv->hw->wiphy), i++, skb, skb->len,
+ le16_to_cpu(hdr->flags), le16_to_cpu(hdr->len),
+ le32_to_cpu(hdr->req_id), le16_to_cpu(hdr->type),
+ range->start_addr, range->end_addr, free);
+
+ prev_addr = range->end_addr;
+ largest_hole = max(largest_hole, free);
+ }
+ free = priv->rx_end - prev_addr;
+ largest_hole = max(largest_hole, free);
+ printk(KERN_DEBUG "%s: \\ --- [free: %d], largest free block: %d ---\n",
+ wiphy_name(priv->hw->wiphy), free, largest_hole);
+ spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
+}
+#endif /* P54_MM_DEBUG */
+
+/*
+ * So, the firmware is somewhat stupid and doesn't know what places in its
+ * memory incoming data should go to. By poking around in the firmware, we
+ * can find some unused memory to upload our packets to. However, data that we
+ * want the card to TX needs to stay intact until the card has told us that
+ * it is done with it. This function finds empty places we can upload to and
+ * marks allocated areas as reserved if necessary. p54_find_and_unlink_skb or
+ * p54_free_skb frees allocated areas.
+ */
+static int p54_assign_address(struct p54_common *priv, struct sk_buff *skb)
+{
+ struct sk_buff *entry, *target_skb = NULL;
+ struct ieee80211_tx_info *info;
+ struct p54_tx_info *range;
+ struct p54_hdr *data = (void *) skb->data;
+ unsigned long flags;
+ u32 last_addr = priv->rx_start;
+ u32 target_addr = priv->rx_start;
+ u16 len = priv->headroom + skb->len + priv->tailroom + 3;
+
+ info = IEEE80211_SKB_CB(skb);
+ range = (void *) info->rate_driver_data;
+ len = (range->extra_len + len) & ~0x3;
+
+ spin_lock_irqsave(&priv->tx_queue.lock, flags);
+ if (unlikely(skb_queue_len(&priv->tx_queue) == 32)) {
+ /*
+ * The tx_queue is now really full.
+ *
+ * TODO: check if the device has crashed and reset it.
+ */
+ spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
+ return -EBUSY;
+ }
+
+ skb_queue_walk(&priv->tx_queue, entry) {
+ u32 hole_size;
+ info = IEEE80211_SKB_CB(entry);
+ range = (void *) info->rate_driver_data;
+ hole_size = range->start_addr - last_addr;
+
+ if (!target_skb && hole_size >= len) {
+ target_skb = entry->prev;
+ hole_size -= len;
+ target_addr = last_addr;
+ break;
+ }
+ last_addr = range->end_addr;
+ }
+ if (unlikely(!target_skb)) {
+ if (priv->rx_end - last_addr >= len) {
+ target_skb = priv->tx_queue.prev;
+ if (!skb_queue_empty(&priv->tx_queue)) {
+ info = IEEE80211_SKB_CB(target_skb);
+ range = (void *)info->rate_driver_data;
+ target_addr = range->end_addr;
+ }
+ } else {
+ spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
+ return -ENOSPC;
+ }
+ }
+
+ info = IEEE80211_SKB_CB(skb);
+ range = (void *) info->rate_driver_data;
+ range->start_addr = target_addr;
+ range->end_addr = target_addr + len;
+ data->req_id = cpu_to_le32(target_addr + priv->headroom);
+ if (IS_DATA_FRAME(skb) &&
+ unlikely(GET_HW_QUEUE(skb) == P54_QUEUE_BEACON))
+ priv->beacon_req_id = data->req_id;
+
+ __skb_queue_after(&priv->tx_queue, target_skb, skb);
+ spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
+ return 0;
+}
+
+static void p54_tx_pending(struct p54_common *priv)
+{
+ struct sk_buff *skb;
+ int ret;
+
+ skb = skb_dequeue(&priv->tx_pending);
+ if (unlikely(!skb))
+ return ;
+
+ ret = p54_assign_address(priv, skb);
+ if (unlikely(ret))
+ skb_queue_head(&priv->tx_pending, skb);
+ else
+ priv->tx(priv->hw, skb);
+}
+
+static void p54_wake_queues(struct p54_common *priv)
+{
+ unsigned long flags;
+ unsigned int i;
+
+ if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED))
+ return ;
+
+ p54_tx_pending(priv);
+
+ spin_lock_irqsave(&priv->tx_stats_lock, flags);
+ for (i = 0; i < priv->hw->queues; i++) {
+ if (priv->tx_stats[i + P54_QUEUE_DATA].len <
+ priv->tx_stats[i + P54_QUEUE_DATA].limit)
+ ieee80211_wake_queue(priv->hw, i);
+ }
+ spin_unlock_irqrestore(&priv->tx_stats_lock, flags);
+}
+
+static int p54_tx_qos_accounting_alloc(struct p54_common *priv,
+ struct sk_buff *skb,
+ const u16 p54_queue)
+{
+ struct ieee80211_tx_queue_stats *queue;
+ unsigned long flags;
+
+ if (WARN_ON(p54_queue > P54_QUEUE_NUM))
+ return -EINVAL;
+
+ queue = &priv->tx_stats[p54_queue];
+
+ spin_lock_irqsave(&priv->tx_stats_lock, flags);
+ if (unlikely(queue->len >= queue->limit && IS_QOS_QUEUE(p54_queue))) {
+ spin_unlock_irqrestore(&priv->tx_stats_lock, flags);
+ return -ENOSPC;
+ }
+
+ queue->len++;
+ queue->count++;
+
+ if (unlikely(queue->len == queue->limit && IS_QOS_QUEUE(p54_queue))) {
+ u16 ac_queue = p54_queue - P54_QUEUE_DATA;
+ ieee80211_stop_queue(priv->hw, ac_queue);
+ }
+
+ spin_unlock_irqrestore(&priv->tx_stats_lock, flags);
+ return 0;
+}
+
+static void p54_tx_qos_accounting_free(struct p54_common *priv,
+ struct sk_buff *skb)
+{
+ if (IS_DATA_FRAME(skb)) {
+ unsigned long flags;
+
+ spin_lock_irqsave(&priv->tx_stats_lock, flags);
+ priv->tx_stats[GET_HW_QUEUE(skb)].len--;
+ spin_unlock_irqrestore(&priv->tx_stats_lock, flags);
+
+ if (unlikely(GET_HW_QUEUE(skb) == P54_QUEUE_BEACON)) {
+ if (priv->beacon_req_id == GET_REQ_ID(skb)) {
+ /* this is the active beacon set anymore */
+ priv->beacon_req_id = 0;
+ }
+ complete(&priv->beacon_comp);
+ }
+ }
+ p54_wake_queues(priv);
+}
+
+void p54_free_skb(struct ieee80211_hw *dev, struct sk_buff *skb)
+{
+ struct p54_common *priv = dev->priv;
+ if (unlikely(!skb))
+ return ;
+
+ skb_unlink(skb, &priv->tx_queue);
+ p54_tx_qos_accounting_free(priv, skb);
+ dev_kfree_skb_any(skb);
+}
+EXPORT_SYMBOL_GPL(p54_free_skb);
+
+static struct sk_buff *p54_find_and_unlink_skb(struct p54_common *priv,
+ const __le32 req_id)
+{
+ struct sk_buff *entry;
+ unsigned long flags;
+
+ spin_lock_irqsave(&priv->tx_queue.lock, flags);
+ skb_queue_walk(&priv->tx_queue, entry) {
+ struct p54_hdr *hdr = (struct p54_hdr *) entry->data;
+
+ if (hdr->req_id == req_id) {
+ __skb_unlink(entry, &priv->tx_queue);
+ spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
+ p54_tx_qos_accounting_free(priv, entry);
+ return entry;
+ }
+ }
+ spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
+ return NULL;
+}
+
+void p54_tx(struct p54_common *priv, struct sk_buff *skb)
+{
+ skb_queue_tail(&priv->tx_pending, skb);
+ p54_tx_pending(priv);
+}
+
+static int p54_rssi_to_dbm(struct p54_common *priv, int rssi)
+{
+ int band = priv->hw->conf.channel->band;
+
+ if (priv->rxhw != 5)
+ return ((rssi * priv->rssical_db[band].mul) / 64 +
+ priv->rssical_db[band].add) / 4;
+ else
+ /*
+ * TODO: find the correct formula
+ */
+ return ((rssi * priv->rssical_db[band].mul) / 64 +
+ priv->rssical_db[band].add) / 4;
+}
+
+/*
+ * Even if the firmware is capable of dealing with incoming traffic,
+ * while dozing, we have to prepared in case mac80211 uses PS-POLL
+ * to retrieve outstanding frames from our AP.
+ * (see comment in net/mac80211/mlme.c @ line 1993)
+ */
+static void p54_pspoll_workaround(struct p54_common *priv, struct sk_buff *skb)
+{
+ struct ieee80211_hdr *hdr = (void *) skb->data;
+ struct ieee80211_tim_ie *tim_ie;
+ u8 *tim;
+ u8 tim_len;
+ bool new_psm;
+
+ /* only beacons have a TIM IE */
+ if (!ieee80211_is_beacon(hdr->frame_control))
+ return;
+
+ if (!priv->aid)
+ return;
+
+ /* only consider beacons from the associated BSSID */
+ if (compare_ether_addr(hdr->addr3, priv->bssid))
+ return;
+
+ tim = p54_find_ie(skb, WLAN_EID_TIM);
+ if (!tim)
+ return;
+
+ tim_len = tim[1];
+ tim_ie = (struct ieee80211_tim_ie *) &tim[2];
+
+ new_psm = ieee80211_check_tim(tim_ie, tim_len, priv->aid);
+ if (new_psm != priv->powersave_override) {
+ priv->powersave_override = new_psm;
+ p54_set_ps(priv);
+ }
+}
+
+static int p54_rx_data(struct p54_common *priv, struct sk_buff *skb)
+{
+ struct p54_rx_data *hdr = (struct p54_rx_data *) skb->data;
+ struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
+ u16 freq = le16_to_cpu(hdr->freq);
+ size_t header_len = sizeof(*hdr);
+ u32 tsf32;
+ u8 rate = hdr->rate & 0xf;
+
+ /*
+ * If the device is in a unspecified state we have to
+ * ignore all data frames. Else we could end up with a
+ * nasty crash.
+ */
+ if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED))
+ return 0;
+
+ if (!(hdr->flags & cpu_to_le16(P54_HDR_FLAG_DATA_IN_FCS_GOOD)))
+ return 0;
+
+ if (hdr->decrypt_status == P54_DECRYPT_OK)
+ rx_status->flag |= RX_FLAG_DECRYPTED;
+ if ((hdr->decrypt_status == P54_DECRYPT_FAIL_MICHAEL) ||
+ (hdr->decrypt_status == P54_DECRYPT_FAIL_TKIP))
+ rx_status->flag |= RX_FLAG_MMIC_ERROR;
+
+ rx_status->signal = p54_rssi_to_dbm(priv, hdr->rssi);
+ rx_status->noise = priv->noise;
+ if (hdr->rate & 0x10)
+ rx_status->flag |= RX_FLAG_SHORTPRE;
+ if (priv->hw->conf.channel->band == IEEE80211_BAND_5GHZ)
+ rx_status->rate_idx = (rate < 4) ? 0 : rate - 4;
+ else
+ rx_status->rate_idx = rate;
+
+ rx_status->freq = freq;
+ rx_status->band = priv->hw->conf.channel->band;
+ rx_status->antenna = hdr->antenna;
+
+ tsf32 = le32_to_cpu(hdr->tsf32);
+ if (tsf32 < priv->tsf_low32)
+ priv->tsf_high32++;
+ rx_status->mactime = ((u64)priv->tsf_high32) << 32 | tsf32;
+ priv->tsf_low32 = tsf32;
+
+ rx_status->flag |= RX_FLAG_TSFT;
+
+ if (hdr->flags & cpu_to_le16(P54_HDR_FLAG_DATA_ALIGN))
+ header_len += hdr->align[0];
+
+ skb_pull(skb, header_len);
+ skb_trim(skb, le16_to_cpu(hdr->len));
+ if (unlikely(priv->hw->conf.flags & IEEE80211_CONF_PS))
+ p54_pspoll_workaround(priv, skb);
+
+ ieee80211_rx_irqsafe(priv->hw, skb);
+
+ ieee80211_queue_delayed_work(priv->hw, &priv->work,
+ msecs_to_jiffies(P54_STATISTICS_UPDATE));
+
+ return -1;
+}
+
+static void p54_rx_frame_sent(struct p54_common *priv, struct sk_buff *skb)
+{
+ struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
+ struct p54_frame_sent *payload = (struct p54_frame_sent *) hdr->data;
+ struct ieee80211_tx_info *info;
+ struct p54_hdr *entry_hdr;
+ struct p54_tx_data *entry_data;
+ struct sk_buff *entry;
+ unsigned int pad = 0, frame_len;
+ int count, idx;
+
+ entry = p54_find_and_unlink_skb(priv, hdr->req_id);
+ if (unlikely(!entry))
+ return ;
+
+ frame_len = entry->len;
+ info = IEEE80211_SKB_CB(entry);
+ entry_hdr = (struct p54_hdr *) entry->data;
+ entry_data = (struct p54_tx_data *) entry_hdr->data;
+ priv->stats.dot11ACKFailureCount += payload->tries - 1;
+
+ /*
+ * Frames in P54_QUEUE_FWSCAN and P54_QUEUE_BEACON are
+ * generated by the driver. Therefore tx_status is bogus
+ * and we don't want to confuse the mac80211 stack.
+ */
+ if (unlikely(entry_data->hw_queue < P54_QUEUE_FWSCAN)) {
+ dev_kfree_skb_any(entry);
+ return ;
+ }
+
+ /*
+ * Clear manually, ieee80211_tx_info_clear_status would
+ * clear the counts too and we need them.
+ */
+ memset(&info->status.ampdu_ack_len, 0,
+ sizeof(struct ieee80211_tx_info) -
+ offsetof(struct ieee80211_tx_info, status.ampdu_ack_len));
+ BUILD_BUG_ON(offsetof(struct ieee80211_tx_info,
+ status.ampdu_ack_len) != 23);
+
+ if (entry_hdr->flags & cpu_to_le16(P54_HDR_FLAG_DATA_ALIGN))
+ pad = entry_data->align[0];
+
+ /* walk through the rates array and adjust the counts */
+ count = payload->tries;
+ for (idx = 0; idx < 4; idx++) {
+ if (count >= info->status.rates[idx].count) {
+ count -= info->status.rates[idx].count;
+ } else if (count > 0) {
+ info->status.rates[idx].count = count;
+ count = 0;
+ } else {
+ info->status.rates[idx].idx = -1;
+ info->status.rates[idx].count = 0;
+ }
+ }
+
+ if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) &&
+ (!payload->status))
+ info->flags |= IEEE80211_TX_STAT_ACK;
+ if (payload->status & P54_TX_PSM_CANCELLED)
+ info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
+ info->status.ack_signal = p54_rssi_to_dbm(priv,
+ (int)payload->ack_rssi);
+
+ /* Undo all changes to the frame. */
+ switch (entry_data->key_type) {
+ case P54_CRYPTO_TKIPMICHAEL: {
+ u8 *iv = (u8 *)(entry_data->align + pad +
+ entry_data->crypt_offset);
+
+ /* Restore the original TKIP IV. */
+ iv[2] = iv[0];
+ iv[0] = iv[1];
+ iv[1] = (iv[0] | 0x20) & 0x7f; /* WEPSeed - 8.3.2.2 */
+
+ frame_len -= 12; /* remove TKIP_MMIC + TKIP_ICV */
+ break;
+ }
+ case P54_CRYPTO_AESCCMP:
+ frame_len -= 8; /* remove CCMP_MIC */
+ break;
+ case P54_CRYPTO_WEP:
+ frame_len -= 4; /* remove WEP_ICV */
+ break;
+ }
+
+ skb_trim(entry, frame_len);
+ skb_pull(entry, sizeof(*hdr) + pad + sizeof(*entry_data));
+ ieee80211_tx_status_irqsafe(priv->hw, entry);
+}
+
+static void p54_rx_eeprom_readback(struct p54_common *priv,
+ struct sk_buff *skb)
+{
+ struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
+ struct p54_eeprom_lm86 *eeprom = (struct p54_eeprom_lm86 *) hdr->data;
+ struct sk_buff *tmp;
+
+ if (!priv->eeprom)
+ return ;
+
+ if (priv->fw_var >= 0x509) {
+ memcpy(priv->eeprom, eeprom->v2.data,
+ le16_to_cpu(eeprom->v2.len));
+ } else {
+ memcpy(priv->eeprom, eeprom->v1.data,
+ le16_to_cpu(eeprom->v1.len));
+ }
+
+ priv->eeprom = NULL;
+ tmp = p54_find_and_unlink_skb(priv, hdr->req_id);
+ dev_kfree_skb_any(tmp);
+ complete(&priv->eeprom_comp);
+}
+
+static void p54_rx_stats(struct p54_common *priv, struct sk_buff *skb)
+{
+ struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
+ struct p54_statistics *stats = (struct p54_statistics *) hdr->data;
+ struct sk_buff *tmp;
+ u32 tsf32;
+
+ if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED))
+ return ;
+
+ tsf32 = le32_to_cpu(stats->tsf32);
+ if (tsf32 < priv->tsf_low32)
+ priv->tsf_high32++;
+ priv->tsf_low32 = tsf32;
+
+ priv->stats.dot11RTSFailureCount = le32_to_cpu(stats->rts_fail);
+ priv->stats.dot11RTSSuccessCount = le32_to_cpu(stats->rts_success);
+ priv->stats.dot11FCSErrorCount = le32_to_cpu(stats->rx_bad_fcs);
+
+ priv->noise = p54_rssi_to_dbm(priv, le32_to_cpu(stats->noise));
+
+ tmp = p54_find_and_unlink_skb(priv, hdr->req_id);
+ dev_kfree_skb_any(tmp);
+}
+
+static void p54_rx_trap(struct p54_common *priv, struct sk_buff *skb)
+{
+ struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
+ struct p54_trap *trap = (struct p54_trap *) hdr->data;
+ u16 event = le16_to_cpu(trap->event);
+ u16 freq = le16_to_cpu(trap->frequency);
+
+ switch (event) {
+ case P54_TRAP_BEACON_TX:
+ break;
+ case P54_TRAP_RADAR:
+ printk(KERN_INFO "%s: radar (freq:%d MHz)\n",
+ wiphy_name(priv->hw->wiphy), freq);
+ break;
+ case P54_TRAP_NO_BEACON:
+ if (priv->vif)
+ ieee80211_beacon_loss(priv->vif);
+ break;
+ case P54_TRAP_SCAN:
+ break;
+ case P54_TRAP_TBTT:
+ break;
+ case P54_TRAP_TIMER:
+ break;
+ case P54_TRAP_FAA_RADIO_OFF:
+ wiphy_rfkill_set_hw_state(priv->hw->wiphy, true);
+ break;
+ case P54_TRAP_FAA_RADIO_ON:
+ wiphy_rfkill_set_hw_state(priv->hw->wiphy, false);
+ break;
+ default:
+ printk(KERN_INFO "%s: received event:%x freq:%d\n",
+ wiphy_name(priv->hw->wiphy), event, freq);
+ break;
+ }
+}
+
+static int p54_rx_control(struct p54_common *priv, struct sk_buff *skb)
+{
+ struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
+
+ switch (le16_to_cpu(hdr->type)) {
+ case P54_CONTROL_TYPE_TXDONE:
+ p54_rx_frame_sent(priv, skb);
+ break;
+ case P54_CONTROL_TYPE_TRAP:
+ p54_rx_trap(priv, skb);
+ break;
+ case P54_CONTROL_TYPE_BBP:
+ break;
+ case P54_CONTROL_TYPE_STAT_READBACK:
+ p54_rx_stats(priv, skb);
+ break;
+ case P54_CONTROL_TYPE_EEPROM_READBACK:
+ p54_rx_eeprom_readback(priv, skb);
+ break;
+ default:
+ printk(KERN_DEBUG "%s: not handling 0x%02x type control frame\n",
+ wiphy_name(priv->hw->wiphy), le16_to_cpu(hdr->type));
+ break;
+ }
+ return 0;
+}
+
+/* returns zero if skb can be reused */
+int p54_rx(struct ieee80211_hw *dev, struct sk_buff *skb)
+{
+ struct p54_common *priv = dev->priv;
+ u16 type = le16_to_cpu(*((__le16 *)skb->data));
+
+ if (type & P54_HDR_FLAG_CONTROL)
+ return p54_rx_control(priv, skb);
+ else
+ return p54_rx_data(priv, skb);
+}
+EXPORT_SYMBOL_GPL(p54_rx);
+
+static void p54_tx_80211_header(struct p54_common *priv, struct sk_buff *skb,
+ struct ieee80211_tx_info *info, u8 *queue,
+ u32 *extra_len, u16 *flags, u16 *aid,
+ bool *burst_possible)
+{
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
+
+ if (ieee80211_is_data_qos(hdr->frame_control))
+ *burst_possible = true;
+ else
+ *burst_possible = false;
+
+ if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
+ *flags |= P54_HDR_FLAG_DATA_OUT_SEQNR;
+
+ if (info->flags & IEEE80211_TX_CTL_PSPOLL_RESPONSE)
+ *flags |= P54_HDR_FLAG_DATA_OUT_NOCANCEL;
+
+ if (info->flags & IEEE80211_TX_CTL_CLEAR_PS_FILT)
+ *flags |= P54_HDR_FLAG_DATA_OUT_NOCANCEL;
+
+ *queue = skb_get_queue_mapping(skb) + P54_QUEUE_DATA;
+
+ switch (priv->mode) {
+ case NL80211_IFTYPE_MONITOR:
+ /*
+ * We have to set P54_HDR_FLAG_DATA_OUT_PROMISC for
+ * every frame in promiscuous/monitor mode.
+ * see STSW45x0C LMAC API - page 12.
+ */
+ *aid = 0;
+ *flags |= P54_HDR_FLAG_DATA_OUT_PROMISC;
+ break;
+ case NL80211_IFTYPE_STATION:
+ *aid = 1;
+ break;
+ case NL80211_IFTYPE_AP:
+ case NL80211_IFTYPE_ADHOC:
+ case NL80211_IFTYPE_MESH_POINT:
+ if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
+ *aid = 0;
+ *queue = P54_QUEUE_CAB;
+ return;
+ }
+
+ if (unlikely(ieee80211_is_mgmt(hdr->frame_control))) {
+ if (ieee80211_is_probe_resp(hdr->frame_control)) {
+ *aid = 0;
+ *flags |= P54_HDR_FLAG_DATA_OUT_TIMESTAMP |
+ P54_HDR_FLAG_DATA_OUT_NOCANCEL;
+ return;
+ } else if (ieee80211_is_beacon(hdr->frame_control)) {
+ *aid = 0;
+
+ if (info->flags & IEEE80211_TX_CTL_INJECTED) {
+ /*
+ * Injecting beacons on top of a AP is
+ * not a good idea... nevertheless,
+ * it should be doable.
+ */
+
+ return;
+ }
+
+ *flags |= P54_HDR_FLAG_DATA_OUT_TIMESTAMP;
+ *queue = P54_QUEUE_BEACON;
+ *extra_len = IEEE80211_MAX_TIM_LEN;
+ return;
+ }
+ }
+
+ if (info->control.sta)
+ *aid = info->control.sta->aid;
+ break;
+ }
+}
+
+static u8 p54_convert_algo(enum ieee80211_key_alg alg)
+{
+ switch (alg) {
+ case ALG_WEP:
+ return P54_CRYPTO_WEP;
+ case ALG_TKIP:
+ return P54_CRYPTO_TKIPMICHAEL;
+ case ALG_CCMP:
+ return P54_CRYPTO_AESCCMP;
+ default:
+ return 0;
+ }
+}
+
+int p54_tx_80211(struct ieee80211_hw *dev, struct sk_buff *skb)
+{
+ struct p54_common *priv = dev->priv;
+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+ struct p54_tx_info *p54info;
+ struct p54_hdr *hdr;
+ struct p54_tx_data *txhdr;
+ unsigned int padding, len, extra_len;
+ int i, j, ridx;
+ u16 hdr_flags = 0, aid = 0;
+ u8 rate, queue = 0, crypt_offset = 0;
+ u8 cts_rate = 0x20;
+ u8 rc_flags;
+ u8 calculated_tries[4];
+ u8 nrates = 0, nremaining = 8;
+ bool burst_allowed = false;
+
+ p54_tx_80211_header(priv, skb, info, &queue, &extra_len,
+ &hdr_flags, &aid, &burst_allowed);
+
+ if (p54_tx_qos_accounting_alloc(priv, skb, queue)) {
+ if (!IS_QOS_QUEUE(queue)) {
+ dev_kfree_skb_any(skb);
+ return NETDEV_TX_OK;
+ } else {
+ return NETDEV_TX_BUSY;
+ }
+ }
+
+ padding = (unsigned long)(skb->data - (sizeof(*hdr) + sizeof(*txhdr))) & 3;
+ len = skb->len;
+
+ if (info->control.hw_key) {
+ crypt_offset = ieee80211_get_hdrlen_from_skb(skb);
+ if (info->control.hw_key->alg == ALG_TKIP) {
+ u8 *iv = (u8 *)(skb->data + crypt_offset);
+ /*
+ * The firmware excepts that the IV has to have
+ * this special format
+ */
+ iv[1] = iv[0];
+ iv[0] = iv[2];
+ iv[2] = 0;
+ }
+ }
+
+ txhdr = (struct p54_tx_data *) skb_push(skb, sizeof(*txhdr) + padding);
+ hdr = (struct p54_hdr *) skb_push(skb, sizeof(*hdr));
+
+ if (padding)
+ hdr_flags |= P54_HDR_FLAG_DATA_ALIGN;
+ hdr->type = cpu_to_le16(aid);
+ hdr->rts_tries = info->control.rates[0].count;
+
+ /*
+ * we register the rates in perfect order, and
+ * RTS/CTS won't happen on 5 GHz
+ */
+ cts_rate = info->control.rts_cts_rate_idx;
+
+ memset(&txhdr->rateset, 0, sizeof(txhdr->rateset));
+
+ /* see how many rates got used */
+ for (i = 0; i < dev->max_rates; i++) {
+ if (info->control.rates[i].idx < 0)
+ break;
+ nrates++;
+ }
+
+ /* limit tries to 8/nrates per rate */
+ for (i = 0; i < nrates; i++) {
+ /*
+ * The magic expression here is equivalent to 8/nrates for
+ * all values that matter, but avoids division and jumps.
+ * Note that nrates can only take the values 1 through 4.
+ */
+ calculated_tries[i] = min_t(int, ((15 >> nrates) | 1) + 1,
+ info->control.rates[i].count);
+ nremaining -= calculated_tries[i];
+ }
+
+ /* if there are tries left, distribute from back to front */
+ for (i = nrates - 1; nremaining > 0 && i >= 0; i--) {
+ int tmp = info->control.rates[i].count - calculated_tries[i];
+
+ if (tmp <= 0)
+ continue;
+ /* RC requested more tries at this rate */
+
+ tmp = min_t(int, tmp, nremaining);
+ calculated_tries[i] += tmp;
+ nremaining -= tmp;
+ }
+
+ ridx = 0;
+ for (i = 0; i < nrates && ridx < 8; i++) {
+ /* we register the rates in perfect order */
+ rate = info->control.rates[i].idx;
+ if (info->band == IEEE80211_BAND_5GHZ)
+ rate += 4;
+
+ /* store the count we actually calculated for TX status */
+ info->control.rates[i].count = calculated_tries[i];
+
+ rc_flags = info->control.rates[i].flags;
+ if (rc_flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) {
+ rate |= 0x10;
+ cts_rate |= 0x10;
+ }
+ if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS) {
+ burst_allowed = false;
+ rate |= 0x40;
+ } else if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
+ rate |= 0x20;
+ burst_allowed = false;
+ }
+ for (j = 0; j < calculated_tries[i] && ridx < 8; j++) {
+ txhdr->rateset[ridx] = rate;
+ ridx++;
+ }
+ }
+
+ if (burst_allowed)
+ hdr_flags |= P54_HDR_FLAG_DATA_OUT_BURST;
+
+ /* TODO: enable bursting */
+ hdr->flags = cpu_to_le16(hdr_flags);
+ hdr->tries = ridx;
+ txhdr->rts_rate_idx = 0;
+ if (info->control.hw_key) {
+ txhdr->key_type = p54_convert_algo(info->control.hw_key->alg);
+ txhdr->key_len = min((u8)16, info->control.hw_key->keylen);
+ memcpy(txhdr->key, info->control.hw_key->key, txhdr->key_len);
+ if (info->control.hw_key->alg == ALG_TKIP) {
+ /* reserve space for the MIC key */
+ len += 8;
+ memcpy(skb_put(skb, 8), &(info->control.hw_key->key
+ [NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY]), 8);
+ }
+ /* reserve some space for ICV */
+ len += info->control.hw_key->icv_len;
+ memset(skb_put(skb, info->control.hw_key->icv_len), 0,
+ info->control.hw_key->icv_len);
+ } else {
+ txhdr->key_type = 0;
+ txhdr->key_len = 0;
+ }
+ txhdr->crypt_offset = crypt_offset;
+ txhdr->hw_queue = queue;
+ txhdr->backlog = priv->tx_stats[queue].len - 1;
+ memset(txhdr->durations, 0, sizeof(txhdr->durations));
+ txhdr->tx_antenna = ((info->antenna_sel_tx == 0) ?
+ 2 : info->antenna_sel_tx - 1) & priv->tx_diversity_mask;
+ if (priv->rxhw == 5) {
+ txhdr->longbow.cts_rate = cts_rate;
+ txhdr->longbow.output_power = cpu_to_le16(priv->output_power);
+ } else {
+ txhdr->normal.output_power = priv->output_power;
+ txhdr->normal.cts_rate = cts_rate;
+ }
+ if (padding)
+ txhdr->align[0] = padding;
+
+ hdr->len = cpu_to_le16(len);
+ /* modifies skb->cb and with it info, so must be last! */
+ p54info = (void *) info->rate_driver_data;
+ p54info->extra_len = extra_len;
+
+ p54_tx(priv, skb);
+ return NETDEV_TX_OK;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-17 00:25:55 +0100